-[INTERNATIONAL SYSTEM] OF [QUANTITIES]-

-as of [21 SEPTEMBER 2024]–

(other quantities (such as [‘area’ / ‘pressure’ / ‘electrical resistance’] are derived from these ‘base quantities’ by ‘clear’ + ‘non-contradictory’ equations)

(the ISQ defines the quantities that are measured with the ‘SI units’ / also includes many other quantities in ‘modern science’ + ‘technology’)

(the ISQ is defined in the ‘international standard ISO/IEC 80000’, and was finalized in ‘2009’ with the publication of “ISO 80000-1”)

(the 14 parts of ‘ISO/IEC 80000’ define quantities used in ‘scientific disciplines’ such as…)

‘mechanics’

‘light’

‘acoustics’
(eg ‘sound pressure’ + ‘sound intensity’)

‘electro-magnetism’

‘information technology’
(eg ‘traffic intensity’ + ‘storage capacity’)

‘chemistry’

‘mathematics’

‘physiology’

*REFERENCES* –>

“1.16”. International vocabulary of metrology – Basic and general concepts and associated terms (VIM) (PDF) (3rd ed.). International Bureau of Weights and Measures (BIPM):Joint Committee for Guides in Metrology. 2012. Retrieved 28 March 2015.

^ ISO 80000-1 Quantities and units. Part 1: General (1st ed.). Switzerland: ISO (the International Organization for Standardization). 2009-11-15. p. vi. Retrieved 23 May 2015.

^ S. V. Gupta, Units of Measurement: Past, Present and Future. International System of Units, p. 16, Springer, 2009 ISBN 3-642-00738-4.

(the status of the requirement for ‘sans-serif’ is not as clear, since ISO 80000-1:2009 makes no mention of it)

(“The conventional symbolic representation of the dimension of a base quantity is a single upper case letter in roman (upright) type.”) whereas the secondary source BIPM JCGM 200:2012 does (“The conventional symbolic representation of the dimension of a base quantity is a single upper case letter in roman (upright) sans-serif type.”).

(the associated [‘symbol’ / ‘SI unit’] are given here for ‘reference’ only)

(they do not form part of the ‘ISQ’)